Straight from engineering:
“The adhesive that we use to bond the lid is 3M part number DP8805NS. Note that it’s an industrial adhesive that requires process control to achieve an acceptable result. DP8805NS must be applied to a solvent prepared surface that has been properly evaporated. Its contains small glass beads to set the bond line gap. Which requires the correct amount adhesive and clamping pressure for the gap to be within specification. We’ve developed automated dispense and production clamping fixtures to achieve a repeatable process on our manufacturing line. While I’m sure consumers can likely obtain DP8805NS online, they may struggle to achieve an acceptable/lasting result.”
This is the fixture: